For me indoor track, carpet or astro we have tu use
Ansmann Mad Rat/Macnum/X/XT Pro: Alum. Front Arm Mount & Weight
For dusty track used the rear hub carrier with 1°
For security i will buy
Ansmann Racing Aluminium Rear Arm Mount - X Pro, XT Pro, Mad Rat & Macnum
I will prefert tu used plastic but there are just in alu
Ansmann Racing Aluminium Front Hub Carrier (30 deg)
And the motor plate if you want.
If you have the mad rat, you can buy this for symply set up
TU0256 Turnbuckle Set 22mm
And like for all the car have the spring set.
This isn't from Ansmann because if you use a B4 you have to but the same option part